七水硫酸镁化学储热材料与应用研究进展

doi:10.16085/j.issn.1000-6613.2021-0828

摘要/Abstract

摘要：

七水硫酸镁是一种具有高储热密度（2.8GJ/m³）、低工作温度（<150℃）的无机盐水合物化学储热材料。开发基于七水硫酸镁的高效热化学储热材料和储热系统，有望在太阳能热利用、工业余热回收、季节性储能、建筑供热等领域取得良好的节能减排应用效果。本文对七水硫酸镁的储热原理、基本物性进行了详细介绍。针对七水硫酸镁在实际应用过程中存在传质阻力大、使用寿命受限、传热性能不足等缺点，文章综述了通过沸石、高分子泡沫、碳材料等改性制备硫酸镁高性能复合材料及储热器的相关研究，并对此材料的未来发展趋势作出评价。

关键词: 化学储热材料, 七水硫酸镁, 复合材料, 水合物, 沸石

Abstract:

Magnesium sulfate heptahydrate is an inorganic salt hydrate chemical heat storage material with high heat storage density (2.8GJ/m³) and low working temperature (<150℃). The development of high-efficiency thermochemical heat storage materials and heat storage systems based on magnesium sulfate heptahydrate is expected to achieve good energy-saving and emission-reduction application effects in the fields of solar thermal utilization, industrial waste heat recovery, seasonal energy storage and building heating. This article introduces in detail the heat storage principle and basic physical properties of magnesium sulfate heptahydrate. Magnesium sulfate heptahydrate faces the shortcomings such as large mass transfer resistance, limited service life, insufficient heat transfer performance, etc. Therefore, the methods to prepare high-performance composite materials are introduced by modifying magnesium sulfate with zeolite, polymer foam and carbon materials, as well as the performance of the thermal storage unit. The paper points out the future development trend of magnesium sulfate heptahydrate for thermochemical storage and application.

Key words: thermochemical storage material, magnesium sulfate heptahydrate (MgSO₄·7H₂O), composite material, hydrate, zeolite

中图分类号:

TK02

付涵勋, 兰宇昊, 凌子夜, 张正国. 七水硫酸镁化学储热材料与应用研究进展[J]. 化工进展, 2022, 41(4): 1956-1969.

FU Hanxun, LAN Yuhao, LING Ziye, ZHANG Zhengguo. Review on development of magnesium sulfate heptahydrate for thermochemical storage and application[J]. Chemical Industry and Engineering Progress, 2022, 41(4): 1956-1969.

图/表 5

参考文献 71

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